Desk-bracket.



7A. R. FERGUSSUN.

DESK BRACKET. [Applicatiun led Dec. 19, 1901.1

(No Model.)

[riveli for: l. Alan 065 lf2/gassen. by 7211s Azforz'cy,

UNITED STATES s PATENT OFFICE.

ALAN ROBB FERGUSSON, OF'NEW YORK, N. Y.

DESK-BRACKET'.

SPECIFICATION forming-part of Letters Patent No. 711,621, datedOctober 21,1902.

Application filed December 19, 1901. Serial No. 86,486. (No model.) y

T0 @ZZ whom it mrtg/concern: l

Beit known that LALAN RoBB-FERGUssoN, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented'certain new and useful Improvements in Desk-Brackets, of which the following is a specification.

This invention relates .to desk-brackets, and particularly to those adapted for carrying incandescent electric lamps and having universally adjustable and extensible overhanging arms, such as illustrated in the United States Letters Patent to'R. W. Pittman, No. 670,904, March 1901, and'United States Letters Patent granted to me, No. 683,455, October 1,1901. v Y

The object of the present invention is to simplify the construction, improve the appearance, increase the usefulness and durability, and reduce the cost of the bracket.

To this end my invention consists in certain combinations of devices and features of construction, all as will be hereinafter fully set forth, and particularly pointed out in the concluding claims. l

In the drawings forming part of this specification, Figure 1 is a view of my improved bracket shown in use upon the top of a desk and carrying in this instance a lamp. Fig. 2 is a fragment illustrating an improved construction of desk-clamp. Fig. 3 is a detail of the preferred construction of lamp-,clamping band. Fig. 4 is a detail of a longitudinallymovable member of a telescopic lamp-carrying arm. Fig. 5 shows the ball member of a ball-and-socket joint formed integral with a neck and hoop for receiving a tubular'arm. Fig. 6 shows in perspective one end of a deskclamp. Fig. 7 shows in perspective one of two members forming a lamp-clamping band. Fig. 8 shows the preferred method of attaching a telescopic clam ping-rod to a desk-plate. A

In the several views portions are broken away or omitted for the sake of clear-illustration, and similar partsare designated by similar figures of reference.

I make a telescopic desk-clamp comprising an outer tube 1 and an inner tube 2, the latter having a crook or claw 3 at its outer end adapted to hook over the rear edge 4: of a desk and the tube 1 being secured to a plate 5, having one-or more downwardly-projecting telescoping tube or rod 2, Fig. 2.

claws, adapted to catch over the front edge 7 of a desksaid plate 5 supporting the end portion of said tube 1 and being preferably soldered thereto, as at 8, Fig. 2. Said plate 5 is also formed with an upturned ear 9, perforated at 10 to receive the shank of a long screw l1, which is threaded into a nut or bushing 12, provided upon the inner end of the The outer tube 1 alines with and lpreferably abuts against the ear 9 and is also preferably inserted through a perforated bent-up ear 13, formed on said pla te.5 opposite the ear 9, whereby said tube issecurely attached to said plate, so that vliability of loosening is avoided. The ear 9 receives the thrust of the head or screw 11, thereby relieving the Atube 1 of stressso that the latter has only to guide the inner rod 2, and hence is not subjected to tension, which would tend to separate it from the plate 5. By the provision of a threaded bushing 12 in the end of the inner rod 2 I am able to use an elongated clamping-screw 11, thereby giving great range of adjustment and enablingv the-bracket to be fitted on desks, or tables of widely-varying widths'without the necessity of cutting threads for a great depth into the tube 2. By this meansI reduce eX- pense and'avoid weakening the tube 2. The clamp is thus simplified in construction and improved in appearance, as well -as rendered .less expensive to manufacture andV easier to place in position and adjust. By bending the tube to form a crook 3 itbecomes practicable to use a light and inexpensive tubewithout l sacrificing strength. Y Upon the base-plate 5 I erect opposite socket members or plates made from sheet metal and each consisting of an ear 1,4, anl

arm 15, and a cupped socket portion 16, each of said plates being secured to said base by a lscrew 17. Between said cupped portions is clamped a ball 18 by means of a screw 19,V the latter connecting the opposite arms 15 and being threaded into one thereof. The socket portions may be substantial duplicates, as illustrated, thereby cheapening thecost of manufacture. By making the socket portions separately and clamping them upon the plate 5 the construction of the device is simplified and the cost reduced, and by placing the end of the outer tube 1 between the arms 15 and against the upturned ear 9 and securing said tube to said plate a compact and solid structure is produced.

Integral with the ball 18is an eye or hoop 20, said hoop and ball being connected by a neck 21, which is adapted to work in the space between the socket members 16 and said hoop forminga seat for receiving the lower or base end of a tubular lamp-carrying arm 22, into which telescopes a tube 23, to whose outer end is pivoted by screw 24 a lamp-band 25. By supporting the tube 22 externally in said hoop the end of the tube may be left open for the introduction of electric conductors 26. The tubes may be provided with suitable insulation, as indicated at 27 and 28, thereby guarding against shortcircuiting. Extra length of conductor may be readily drawn into the arm as the member 23 is extended. One of the important features of my present improvements resides in the provision of a hollow lamp-carrying arm supported for universal adjustment and having an open-ended base portion for receiving an electrical conductor.

As seen at Fig. 1, the lamp-clamping band 25 consists of oppositely-bowed members for encircling the neck of the lamp, said members being connected by a clamping-screw 29. The band in its preferred form (illustrated at Figs. 3 and 7) is provided with a longitudinal recess or channel 30, said band being intended to lit upon a flange 31, usually held upon the head or socket portion of an incandescent lamp by means of screws 32, the heads of said screws jutting out from said collar 31 and the channel affording a clearance for said screw-heads. The edge portions 33 and 3l of the band upon each side of said recess may contact directly with the lampange 31. By this means the bulb 35 of the lamp may be held well away from the bracketarm 23, not only giving a greater range of movement to the bulb, but also affording plenty of room for placing shades of various kinds upon the lamp.

Variations may be resorted to within the scope of the invention, and portions of my improvements may be used without others.

Having described my invention, I claim- 1. In a desk-bracket, the combination V4of telescopic members each having a claw for clasping a desk-top, means for adjusting said telescopic members so as to cause the claws to draw together to clasp the desk-top, and an adjustable carrier-arm connected to one of said telescopic members.

2. In a desk-bracket, the combination of telescopic members having oppositely-acting claws at their outer ends for clasping a desktop, ascrew for adjusting said telescopic members so as to cause the claws to draw together to clasp the desktop, and a telescopic carrierarm connected to one of said clasping members.

3. In a desk-bracket, the combination of two telescopic members, one having at its outer end a claw and the other having at tached thereto an opposing `claw, a screw for drawing said claws toward each other, and a carrier-arm adjustable upon one of said telescopic members.

4c. In a desk-bracket, the combination of two telescopic tubes having means at their outer ends to clasp a desk-top, an internal screw for eecting telescopic adjustment of.' said tubes, and an adjustable projecting carrier-arm articulated upon or to one of said tubes.

5. In a desk-bracket, the combination of two telescopic members; a claw provided upon the outer end of the inner telescopic member; means upon the outer telescopic member opposing said claw; ascrew inserted in the end of said outer telescopic member; a nut or bushing upon the end of said inner telescopic member into which said screw is threaded; and an adjustable carrier-arm connected to one of said telescopic members.

6. In a desk-bracket, the combination of two telescopic tubes; a claw upon the outer end and a bushing at the inner end of the inner tube; a claw attached to the outer end of the other telescopic tube; a screw inserted in the end of the outer telescopic tube; said screw being threaded into said bushing; and an adjustable carrier-arm connected to one of said tubes.

7. In adesk-bracket, the combination of an inner telescopic tube 2 having a bushing 12 and a claw 3; an outer telescopic tnbe 1 attached to a plate 5; a claw 6 upon said plate; an ear 9 formed upon said plate; and a screw 11 passing through said ear and inserted in the end of said tube 2; said screw being threaded into said bushing.

8. In a desk-bracket, the combination of an inner telescopic tube 2 having a bushing 12 and a crook 3; an outer telescopic tube 1 attached to a plate 5; a claw 6 upon said plate; an ear 9 upturned upon said plate between said fingers, the outer telescopic tube abutting against said ear; and a screw 11 passing through said ear and inserted in the end of said inner telescopic tube; said screw being threaded into said bushing.

9. In a desk-bracket, the combination of a tube`1; a rod telescoping into said tube and provided with a claw, screw-engaging means at the end of said rod opposite said claw; a plate having opposite ears, through one of which the said tube is inserted and against the other of which the said tube abuts, a claw upon said plate, and a screw bearing against the last-mentioned ear and inserted in the end of said tube, and engaging said screwengaging means.

10. In a desk-bracket, the combination with a tube of a hooked member telescoping into said tube, a plate having a claw 6 opposed to the hook, and also having an ear 9, a screw bearing against said ear and inserted into the IOO IIO

end of said tube and engaging threads provided upon said hooked member; said tube being attached to said plate in line with said ear; separate socket-plates placed one upon each side of said tube and attached to said claw-plate; a screw for drawing said socketplates toward each other; a ball clasped by said socket-plates; and a carrier-arm mounted upon said ball.

11. In a desk-bracket, the combination with a socket of a ball mounted therein, an integral seat formed externally upon said ball, and atubular carrier-arm secured upon said seat; said carrier-arm being open throughout so as to permit a exible electrical conductor to be ledtherethrough, so that said arm may be moved while the electrical device carried thereby is in operation.

12. In a desk-bracket, the combination with a socket and a base of a ball mounted in said socket, a neck upon said ball, a seat upon said neck, said ball, neck and seat being integral, and a tubular carrier-arm secured upon said seat; said carrier-arm being open throughout so as to permit ya iiexible electrical conductor to be led therethrough, so that said arm may be moved While the electrical device carried thereby is in operation.

13. In a desk-bracket, the combination with a socket and a base of a 4ball mounted in said socket; a hoop provided upon. said ball; and a tubular carrier-arm mounted in said hoop; said carrier-arm being open throughout so as to permit a iexible electrical conductor to be led therethrough, so that said arm may be moved while the electrical device carried thereby is in operation.

14. In a desk-bracket, the combination with a socket and a base of a ball mounted in said socket, aneck upon said ball, a hoop upon said neck, said ball, neck and hoop being integral, and a tubular carrier-arm mounted in said hoop; said carrier-arm being open throughout so as to permit a flexible electrical conductor to be led therethrough, so that said arm may be moved while the electrical device carried therebyis in operation.

15. .In a desk-bracket, the combination with a desk-clasp and a carrier-arm mountedadjustably thereon of a lamp-clamping band pivoted upon the end of said adjustable carrier-arm and having a recess into which may protrude the head of a lamp-screw.

16. In a desk-bracket, the combination with a desk-clasp and a carrier-arm mounted adjustably thereon, of a lamp-clamping band mounted upon the end of said arm and having a longitudinal recess or channel 30, for accommodating a projecting screw upon the head of an electric lamp.

17. The combination of a tube 1; a tube 2 having a crook 3 and telescoping into said tube 1; a plate 5 to which said tube 1 is -attached, said plate having a pair of claws 6 opposite to said crook 3, and also having a perforated ear 9; a screw 11 passing through said ear and into the end of said tube 1; a bushing 12 in the end of said tube '2. and threaded to receive `said screw; arms, 15 having ears 14 secured to said plate 5; said tube 1 lying between said arms; a screw 19 connecting said arms; opposing cups 16 formed in the ends of said arms; a ball 18 inserted between said cups; a neck 2l and a hoop 20 integral with said ball; said neck working in the opening between said cups 16; a tubular arm 22 mounted in said hoop 20; a tube 23 telescoping into said arm 22; a band 25 pivoted upon the end of said tube 23 and having a recess or channel 31; an incandescent lamp held by said band; conductors 26 inserted into the open end of the tube 22 and passing through the tube 23 and thence to the lamp; and insulating material in said tubes 22 and 23.

ALAN ROBB FERGUSSON.

Witnesses:

B. C. STICKNEY, FRED. J. DOLE. 

